Computer Chess Club Archives




Subject: Re: Zappa-Isichess

Author: Matthew Hull

Date: 08:00:23 08/20/05

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On August 20, 2005 at 09:54:11, Tord Romstad wrote:

>On August 20, 2005 at 09:20:43, Robert Hyatt wrote:
>>I do have a problem with programs that are using shared code for tasks
>>that are not strictly one-answer tasks.  EGTBs are a counter-point, in that
>>everyone gets the _same_ EGTB score whether they use Eugene's code, write their
>>own probe for his tables, or write code to build their own tables.
>It is not quite that simple.  First of all, it is not at all sure that everybody
>the same EGTB score regardless of what code and tables they use.  The score
>will depend on whether you use distance to mate or distance to conversion,
>on whether you consider the 50 move rule, and on whether you have bugs
>(we are talking about non-trivial code, after all).  An even more important
>point is that EBGT probing in not only about getting the right result, but also
>about getting the right result *quickly*.  It is not at all easy to compress the
>EGTBs down to a manageable size and still be able to decompress and probe
>quickly on the fly.
>In my opinion, including Nalimov's EGTB code in the program is no better
>(and no worse) than using a GUI book.

EGTBs don't play moves.  GUI's do.  Therefore they are not the same.


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